Shedding mechanism for looms.



H. BARDSLBY.

SHEDDING MECHANISM FOR LO0MS..

APPLICATION rmm D130. 31, 1906.

91 3,935. Patented Mar. 2, 1909.

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H. BARDSLEY.

SHEDDING MECHANISM FOR LOOMS.

APPLIQATION TILED 1120.31, 1906.

91 3,935. Patented Mar. 2, 1909.

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HENRY BARDSLEY, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO CROMPTON & KNOWLES LOOM WORKS, A CORPORATION OF MASSACHUSETTS.

SHEDDING MECHANISM FOR LOOMS.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed December 31, 1906. Serial No. 350,207.

To all whom it may concern:

Be it known that I, HENRY BARDSLEY, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Shedding Mechanism for Looms, of which the following is a specification.

My invention relates to improvements in pattern mechanism for looms, and to that class of looms having a dobby pattern chain mechanism, and an auxiliary or multiplier pattern chain mechanism, and my invention particularly relates to improvements in the dobby pattern chain driving mechanism.

The object of my invention is to provide an improved dobby pattern chain driving mechanism in the class of looms referred to.

In the ordinary construction of the dobby pattern chain driving mechanism in the class of looms referred to, as shown and described in U. S. Letters Patent, No. 691,608,

of Jan. 21, 1902, there are some objections in using a multiplier chain on a loom where the shuttle boX motion is indicated from a se arate chain head, for in changing the do bby pattern chain from one row of pins or pegs on the chain bar, to another row of ins or egs, the chain is dropped back one ar, and in changing back again, the chain is dropped another bar, so that the dobby pattern chain is continually running behind the shuttle box pattern chain, which does not drop back as the dobby pattern chain does, but is always moved forward. In order to overcome these objections I have particularly provided my improvements in dobby pattern chain driving mechanism.

I have shown in the drawings detached portions of the dobby pattern chain mechanism, and multiplier pattern chain mechanism shown in Patent No. 691,608, referred to, with my improvements combined therewith, sufficient to enable those skilled in the art to understand the construction and operation thereof.

Referring to the drawings :Figure 1 is an end view of portions of a dobby mechanism, and of my lmprovements combined therewith, looking in the direction of arrow a, Fig. 2.v The hand wheel shown in Fig. 2 is not shown in Fig. 1, and some of the parts are broken away. Fig. 2 is an end view of the parts shown in Fig. 1, looking in the direc tion of arrow b, same figure, and also shows the hand wheel, which is not shown in Fig. 1; the worm shaft is shown in section, and the dobby pattern cylinder shaft is broken away. Fig. 3 shows detached, and in a different position, a part of the mechanism shown in Fig. 1.

In the accompanying drawings, 1 is the dobby stand or endframe, which is secured to the main frame of the loom, and on which the several parts of the dobby pattern chain cylinder driving mechanism are supported. The end-frame 1 has an elongated opening 1 therein, and a horizontally moving lifter or knife 2, which is connected by a link 3 with the rocker 4 fast on the rock shaft 5.

6 is the dobby pattern chain cylinder, fast on the shaft 7 which is mounted in suitable bearings, and has on its front end the hand wheel 8. Loose on the shaft 7 is the pattern cylinder 9 carrying the pattern chain 10, in this instance made up of links pivotally connected together, and one or more of said links having a projection 10 thereon, forming a pattern surface.

11 is the worm drive shaft of the dobby pattern chain cylinder shaft 7, which shaft is loosely mounted to have a rotary motion and also a longitudinal motion, in bearings 12 on a stand 13 secured to the dobby frame. The worm shaft 11 has a worm 14 fast thereon, which meshes with and operates a worm gear 15 fast on the dobby pattern chain cylinder shaft 7, see Fig. 1. On the worm shaft 11 is fast in this instance a pinion 16, which meshes with and is driven by a pinion 17 on a shaft 18, mounted in suitable bearings 19, on brackets or stands 20. The shaft 1.8 has a sprocket wheel 21 fast thereon, which is connected by a sprocket chain 22 with a sprocket wheel 23, fast on the shaft 24, mounted in bearings at the lower end of an arm or hanger, see Fig. 1. The shaft 24 has also fast thereon, not shown, a gear which meshes with and is driven by a gear, not shown, fast on the crank shaft of the loom.

253 is an idle sprocket wheel mounted on a stud 23 on the end of an arm 23 fast on the bearing 19 on the shaft 18.

Connected with or forming a part of the pinion 16, fast on the worm shaft 11, and in this instance extending out from one side thereof, is a cam hub or collar 25, having thereon a spiral cam shaped portion 25.

- A lever 26 is pivotally mounted at one end on a pin or stud 27, on a stationary stand for arm 28. The lever 26 is located at one side of the worm shaft 11, in this instance over the worm shaft, and its free end 26 is made forked or yoke shaped, to receive the worm shaft 11. The lever 26 has a downward extension 26 thereon, which is adapted to be moved out of the path of and to extend into the path of and engage the cam hub or collar 25.

Extending over the multiplier pattern chain 10 is a pattern indicator lever 29, which has an engaging end or foot 29 thereon. The lever 29 is pivotally mounted on a stud or pin 30 on the upper end of a stand or bracket 31, secured to the dobby frame. The attern indicator lever 29 is bent outwardly at its front end, as shown at 29", in Fig. 2, to bring the foot or engaging end 29 thereon over the pattern chain 10, and is held in yielding engagement with said pattern chain by a helically coiled tension spring 32, attached to a projection 29" on said ever 29, and to some stationary part of the loom. The inner or hub end of the pattern indicator lever 29 has a downwardly extending arm 29 thereon, having an elongated slot 29 through the lower end thereof. A bolt 33 extends through the slot 29"*, and adjustably connects the extension 29 on the lever 29 with a lever 34, having its hub 34 pivotally mounted on the stud 30. The lower end of the lever 34 carries a pin 35, on which is pivotally mounted the hub 36 on one end of a link 36; the other end of the link 36 has a hub 36 thereon, which is pivotally mounted on a pin or stud 37 on the lever 26.

A pawl 38 is pivotally mounted on a stud 39 on a bracket 40 on the rocker 4, and operates a ratchet wheel 41, see Fig. 2, when it is not held out of engagement therewith by the awl shield 42, all as fully described in said atent No. 691,608.

From the above description in connection with the drawings, the operation of my improvements will be readily understood by those skilled in the art. When in the rotation of the pattern chain cylinder shaft 7, and the pattern chain cylinder 9 carrying the pattern chain 10, through the rotation of the worm 14 fast on the worm shaft 11, and pinion 15, and pinion 16 operated by the sprocket chain driving mechanism, in the ordinary way, a high link 10 comes under the engaging end of the pattern indicator lever 29, through the extension 29% lever 34, and link 36, the lever 26 is raised, as shown in Fig. 1. The pattern chain cylinder 6, and the pattern chain cylinder shaft 7 are held by the friction pattern surfaces on the cylinder 6 against the pattern fingers this friction is suflicient to prevent the further rotation of the shaft 7, and consequently the gear 15 remaining stationary,

the continued revolution of the worm 14, will cause the longitudinally moving worm shaft 11, to move to the left in Fig. 1, or in the direction of arrow 0, until the worm engages the bearing 12 of said shaft, and then the driving of the dobby pattern chain cylinder continues, it having remained stationary for one pick. When the link 10 passes from under the engaging end of the pattern indicating lever 29, the lever 29 is drawn down by the spring 32, and through connections to the lever 26, said lever 26 is dropped until the projection 26 thereon engages the cam collar 25, and through the engagement of the spiral cam portion 25 thereon with the promotion 26', the worm shaft 11 is moved toward the right, Fig. 1, until the collar 38, fast on the end of the worm shaft 11, strikes against the bearing 12, when the projection 26 on the lever 26 will dro down over the end of the collar 25, to locli the worm shaft 11 and the worm 14 thereon in position. The dobby pattern chain is moved one bar by the longitudinal motion of the worm shaft 11, and one bar by the rotary motion thereof, to bring the chain in the same position that it was before it was dropped back.

By means of my improvements, through the longitudinal movement of the worm shaft 11 and the worm 14, as above described, there is a gain of one bar, so that in changing from one row of pegs or pins on the dobby pattern chain bars, and back again, there is no loss of a bar, and there is no running behind of the dobby pattern chain, relatively to the box pattern chain.

It will be understood that the details of construction of my improvements may be varied if desired, and they may be ada ted to be applied to dobby pattern chain mec anisms of ordinary construction and operation.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a pattern mechanism for looms, the combination with the dobby pattern chain cylinder shaft, and a worm gear thereon, of a shaft having a worm thereon to rotate the dobby pattern chain cylinder shaft, said worm shaft having a rotary motion and also a longitudinal motion, said longitudinal motion allowing said worm shaft to rotate while the pattern chain cylinder shaft is stationary, and means for returning said worm shaft to its normal position longitudinally, the operation of said means controlled by a multiplier chain pattern.

2. In pattern mechanism for looms, in combination, a pattern cylinder, a worm shaft to drive said cylinder, said shaft having a rotary motion, and also a longitudinal motion, and a cam collar fast thereon, a second pattern cylinder, a pattern indicator lever therefor, and connections intermediate said lever and said cam collar, to cause the longitudinal motion of said worm shaft in one direction.

3. In pattern mechanism for looms in combination, a pattern cylinder, a worm shaft to drive said cylinder, said shaft having a rotary motion and also a longitudinal motion, and a cam collar fast thereon, a second attern cylinder, 'a pattern indicator lever t erefor, connections intermediate said lever and a second lever, and said second lever, pivotally mounted on a stationary stand, and having an extension thereon adapted to be moved out of and into the path of said cam collar, and to engage said cam collar, to cause the longitudinal movement of said worm shaft in one direction.

4. In pattern mechanism for loom dobbies in combination, a pattern cylinder, a worm gear connected therewith, a worm engaging said worm gear, a worm shaft carrying said worm, and having a rotary motion and also a longitudinal motion, a cam collar fast on said worm shaft, and means for rotating said shaft, a second attern cylinder, a pattern indicator lever t erefor, connections intermediate said pattern indicator lever and a lever pivotally mounted on a stationary stand, and said lever, having a part thereof adapted to be moved out of engagement with, or into engagement with said cam collar, and through its engagement with said cam collar, to move the worm shaft longi tudinally in one direction during the rotary movement thereof, and to lock or hold the worm shaft after its longitudinal movement in one direction.

HENRY BARDSLEY.

Witnesses:

E. NISBET, H. S. FAVOR. 

